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Applications of flight control system methods to an advanced combat rotorcraftAdvanced flight control system design, analysis, and testing methodologies developed at the Ames Research Center are applied in an analytical and flight test evaluation of the Advanced Digital Optical Control System (ADOCS) demonstrator. The primary objectives are to describe the knowledge gained about the implications of digital flight control system design for rotorcraft, and to illustrate the analysis of the resulting handling-qualities in the context of the proposed new handling-qualities specification for rotorcraft. Topics covered in-depth are digital flight control design and analysis methods, flight testing techniques, ADOCS handling-qualities evaluation results, and correlation of flight test results with analytical models and the proposed handling-qualities specification. The evaluation of the ADOCS demonstrator indicates desirable response characteristics based on equivalent damping and frequency, but undersirably large effective time-delays (exceeding 240 m sec in all axes). Piloted handling-qualities are found to be desirable or adequate for all low, medium, and high pilot gain tasks; but handling-qualities are inadequate for ultra-high gain tasks such as slope and running landings.
Document ID
19900002436
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Tischler, Mark B. (NASA Ames Research Center Moffett Field, CA, United States)
Fletcher, Jay W. (NASA Ames Research Center Moffett Field, CA, United States)
Morris, Patrick M. (Army Aviation Research and Development Command Moffett Field, CA., United States)
Tucker, George T. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1989
Subject Category
Aircraft Stability And Control
Report/Patent Number
USAAVSCOM-CP-89-A-002
NASA-TM-101054
A-89006
AD-A211906
NAS 1.15:101054
Meeting Information
Meeting: Royal Aeronautical Society International Conference on Helicopter Handling Qualities and Control
Location: London
Start Date: November 15, 1988
End Date: November 17, 1988
Accession Number
90N11752
Funding Number(s)
PROJECT: RTOP 505-61-51
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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